fake URLs work in Blog, messing with Google
 

For whatever reason my vB Blog will accept any path past blog.php and all it takes is for some idiot member to mess up and google starts indexing fake pages

For example this URL is accepted

http://www.physicsforums.com/blog.php/customavatars
http://www.physicsforums.com/blog.php/hellothere
http://www.physicsforums.com/blog.php/123abc

These URLs should show a 404, but for some reason they are accepted.

Any fix?